Lexus ES: Vehicle Control History
VEHICLE CONTROL HISTORY
DESCRIPTION
- Vehicle Control History is a function that captures and stores ECU data when triggered by specific vehicle behavior.
- It may be possible to determine the cause of the malfunction by checking the vehicle history information and freeze frame data.
- The number of possible stored Freeze Frame Data sets, whether multi Freeze Frame Data is available, the number of freeze frame points, Freeze Frame Data items, the ECU internal range, etc., is different depending on the stored group.
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The stored data items for Vehicle Control History Freeze Frame Data are different depending on the stored group. When the value of a data item does not change across all points, only the value of the detection point will be displayed. The contents of the Freeze Frame Data is almost the same as that of the Data List.
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PRECAUTIONS
- As Vehicle Control History may be overwritten whenever the trigger conditions are met, make sure to save Vehicle Control History before performing any inspections.
- As Vehicle Control History may be stored when performing an Active Test, learning, etc., make sure to clear the Vehicle Control History before returning the vehicle to the customer.
| Code | Tester Display | Measurement Item | User Notification | Diagnostic Note |
|---|---|---|---|---|
| X0451 | FL Speed Sensor Wrong Installation | History of front speed sensor LH being installed incorrectly |
| Refer to FL Speed Sensor Wrong Installation (X0451). |
| X0452 | FR Speed Sensor Wrong Installation | History of front speed sensor RH being installed incorrectly |
| Refer to FR Speed Sensor Wrong Installation (X0452). |
| X0453 | RL Speed Sensor Wrong Installation | History of rear speed sensor LH being installed incorrectly |
| Refer to RL Speed Sensor Wrong Installation (X0453). |
| X0454 | RR Speed Sensor Wrong Installation | History of rear speed sensor RH being installed incorrectly |
| Refer to RR Speed Sensor Wrong Installation (X0454). |
| X0455 | Steering Angle Sensor Wrong Installation | History of steering angle sensor being installed incorrectly |
| - |
| X0456 | Yaw Rate Sensor Wrong Installation | History of yaw rate sensor (airbag ECU assembly) being installed incorrectly |
| Refer to Yaw Rate Sensor Wrong Installation (X0456). |
| X2079 | Communication Error from Brake Control Module to Engine Control Module | History of receiving an invalid communication signal from ECM |
|
|
| X2086 | SRS Airbag Malfunction | History of receiving an abnormal secondary collision brake control request signal from airbag ECU assembly | - | Refer to How to Proceed with Troubleshooting in Airbag System. |
| X2087 | Engine Malfunction | History of receiving an SFI system abnormal signal from ECM |
| Refer to How to Proceed with Troubleshooting in SFI System. |
| X208A | Zero Point Calibration of Steering Angle Sensor Initialization Malfunction | History of failure in acquiring steering angle zero point even after the vehicle is driven in a straight line at a vehicle speed of 15 km/h (9 mph) or more for 115 seconds or more with the steering angle sensor zero point calibration cleared |
| Refer to Zero Point Calibration of Steering Angle Sensor Initialization Malfunction (X208A). |
| X208B | EPB Motor Continuous Operation Request | History of system suspended to prevent overheat of parking brake actuator assembly when electric parking brake was used repeatedly |
|
|
| X2096 | Pre-Collision Brake | History of pre-collision brake operation | In accordance with Pre-collision System behavior | - |
| X2098 | Pre-Collision Brake Assist | History of pre-collision brake assist operation | In accordance with Pre-collision System behavior | - |
| X20A0 | ABS | History of ABS operation | - | - |
| X20A1 | VSC | History of VSC operation | Slip indicator light blinks | - |
| X20A2 | TRC(TRAC) | History of TRAC operation | Slip indicator light blinks | - |
| X20A5 | Hill Start Assist | History of hill start assist operation | - | - |
| X20A7 | Brake Assist | History of brake assist operation | - | - |
| X20A8 | Secondary Collision Brake | History of secondary collision brake operation | - | - |
| X20A9 | ABS Continuous Operation Request | History of ABS being operated for 60 seconds or more |
| - |
| X20AA | VSC Continuous Operation Request | History of VSC being operated for 10 seconds or more |
| - |
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*1: The brake warning light / red (malfunction) illuminates when any of the following vehicle conditions are met:
- When EBD is prohibited
- When a malfunction has occurred
- When failure compensation control is prohibited
-
*2: When the vehicle is put into the following vehicle conditions and the brake hold switch (electric parking brake switch assembly) is turned on, the brake hold operation light blinks.
-
Conditions required for operation standby:
- The driver door is closed.
- The driver seat belt is fastened.
-
Conditions required for operation standby:
CHECK VEHICLE CONTROL HISTORY (ELECTRONICALLY CONTROLLED BRAKE SYSTEM AND ELECTRIC PARKING BRAKE SYSTEM)
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / Brake/EPB / Utility / Vehicle Control History (RoB).
Chassis > Brake/EPB > Utility| Tester Display |
|---|
| Vehicle Control History (RoB) |
CLEAR VEHICLE CONTROL HISTORY (ELECTRONICALLY CONTROLLED BRAKE SYSTEM AND ELECTRIC PARKING BRAKE SYSTEM)
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / Brake/EPB / Utility / Vehicle Control History (RoB).
Chassis > Brake/EPB > Utility| Tester Display |
|---|
| Vehicle Control History (RoB) |
(f) Press the DTC clear button.
NOTICE:
By performing this procedure, all stored Vehicle Control History items will be cleared.
VEHICLE CONTROL HISTORY (AIRBAG SYSTEM)
HINT:
A part of the control history can be confirmed using the vehicle control history.
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Vehicle Control History
VEHICLE CONTROL HISTORY DESCRIPTION
Vehicle Control History is a function that captures and stores ECU data when triggered by specific vehicle behavior.
It may be possible to determine the cause
VSC does not Operate or VSC does not Operate Correctly
DESCRIPTION When TRAC or VSC is operating, the skid control ECU (brake actuator assembly) blinks the slip indicator light to inform the driver that slippage occurred. When a communication malfunction
VSC OFF Switch Circuit
DESCRIPTION The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication. Pressing the VSC OFF switch turns off TRAC operation, and pressing and
SEE MORE:
Removal
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during front lower No. 1 suspension arm sub-assembly removal/installation are shown below. Necessary Procedure
Rear Right Center Sensor Malfunction (C1AE8)
DESCRIPTION The rear center ultrasonic sensor RH is installed to the rear bumper. The clearance warning ECU assembly detects obstacles based on signals received from the rear center ultrasonic sensor RH. If the rear center ultrasonic sensor RH has an open circuit or other malfunction, it will not fu
